Do you know which is Japan’s most legendary ghost story? It’s Yotsuya Kaidan (四谷怪談) – a 300-year-old tale of Oiwa, a woman betrayed and murdered, who became a vengeful spirit, spreading never-ending terror.

💀 The Legend in Brief:
✔ Oiwa was poisoned by her husband, Iemon, which horribly disfigured her face.
✔ She died in agony, but her soul could not find peace, carrying intense resentment.
✔ Oiwa haunted Iemon, driving him insane with constant hallucinations until he ultimately died in terror.
1️⃣ Yotsuya Kaidan – Japan’s Most Terrifying Legend
👀 Even after centuries, the name Oiwa still evokes fear in Japanese culture—appearing in Kabuki theater, films, and urban legends.
But what is the truth behind Oiwa’s ghost? Is it just a legend, or is there something even more terrifying?
2️⃣ Oiwa’s Ghost and Iemon’s Horrific Death
After murdering Oiwa, Iemon believed he could enjoy a new life. But he had no idea his real nightmare had just begun.
🔥 Strange events began happening. He saw Oiwa everywhere—in the darkness, in mirrors, beneath the floor…
A freezing wind blew through, carrying the stench of rotting flesh. Oiwa’s white, lifeless eyes glared at him, her twisted face curling into an unnatural smile.
In a fit of madness, Iemon stabbed his new wife, mistaking her for Oiwa. Other spirits joined the haunting, pushing him to his doom.
In the end, Iemon died in sheer terror. When authorities investigated, they found a scene of blood-soaked horror—but Iemon’s body was nowhere to be found.
Had Oiwa’s curse dragged him to hell?
3️⃣ Was Oiwa Just a Ghost… or Something Worse?
Initially, Oiwa was merely a yūrei (幽霊)—a restless ghost unable to pass on due to wrongful death. But as time passed, her grudge became so powerful that many believe she evolved into a demonic yūrei spirit.
🔥 So where is the line between a ghost and a demon?
✔ Ghost (yūrei): A deceased soul, which can pass on if appeased.
✔ Demon (oni): A supernatural entity, filled with malevolent power, never able to move on.
⚡ If a soul is consumed entirely by hatred, it may become a being that exists forever in darkness. And with the sheer terror Oiwa caused, perhaps she was no longer just an ordinary ghost…
4️⃣ Oiwa Shrine – A Restless Spirit’s Testament
Despite her terrifying legend, Tokyo still has the Oiwa Inari Shrine (於岩稲荷田宮神社), built to calm her spirit.
⛩️ Locals believe:
✔ Disrespecting Oiwa brings misfortune.
✔ Mocking her name can trigger her curse.
✔ Many visit the shrine to pray for peace and ask for her forgiveness.
📌 According to shrine records, those who act disrespectfully—such as speaking rudely or laughing loudly—often experience misfortune soon after.
5️⃣ Mysterious Incidents Linked to Oiwa’s Curse
🕯️ Actors and Filmmakers Struck by Disaster
Those who create films or plays about Yotsuya Kaidan without seeking Oiwa’s permission often encounter strange accidents:
✔ Cameras suddenly break.
✔ Actors see Oiwa’s distorted face in mirrors.
✔ Some fall seriously ill or get into accidents soon after mocking the curse.
🚗 A Film Director’s Fatal Car Accident
One director once declared:
❌ “The Oiwa curse is just superstition.”
🔥 But right before his film was completed, he died in a car crash.
👀 Tourists Experiencing Strange Occurrences at Oiwa Shrine
✔ A group of tourists laughed and joked at the shrine—only to have an accident on their way home.
✔ Some reported dreaming of Oiwa standing at their bedside, staring at them with her deformed face.
📌 Coincidence? Perhaps. But when too many coincidences happen, they become something much more terrifying.
6️⃣ Oiwa – Fiction or Reality?
Was Oiwa just a legend, or did she really exist? According to researcher Taro Yamada in Ghosts of the Edo Period (2020), a real case in 18th-century Yotsuya—where a woman was poisoned by her husband—may have inspired the story of Oiwa.
🔎 Historical Theories:
✔ There may have been an actual poisoning or murder case in Yotsuya.
✔ The Yotsuya Kaidan story could be a dramatized version of real events.
🧠 Psychological & Scientific Perspectives:
✔ When many people believe in something, it can create a self-fulfilling prophecy.
✔ Those aware of Oiwa’s curse may subconsciously cause their own accidents due to fear and paranoia.
📌 No matter the truth, one thing is certain: No one dares to disrespect Oiwa.
🎬 Famous Films About Yotsuya Kaidan
🔥 If you want to explore this legend further, check out these films:
✔ Tokaido Yotsuya Kaidan (1959) – The most classic version.
✔ Illusion of Blood (1965) – A fresh perspective on the tale.
✔ The Curse of Oiwa (1969) – Takes the horror to the extreme.
💀 Would you dare challenge Oiwa’s curse? Or do you believe that once you know about her, there’s no escape? 👀